Feed for bobbin winding machines



Sept. 1934. H. F. BORG E 1- AL I FEED FOR BOBBIN WINDING MACHINES Filed,Dec. 6, 1933 2 Sheets-Sheetv l Jnuentov's Herbert F. Ber Dm walk 60Sept. 11, 1934. H. F. BORG E'TAL 1,973,328

FEED FOR BOBBIN WINDING MACHINES Filed Dec. 6, 1933 ZSheets-Sheet 2 ET]10 I. I

3R v sa I v v nuentor's FIE: 1 Herbert, F. Bor

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(lttov'n q Duqadd a. wa\ kev' Patented Sept. 11, 1934 PATENT OFFICE FEEDFOR BOBBIN WINDING MACHINES Herbert F. Borg and DugaldE. Walker,Worcester, Mass., assignors to Lyseth Thread Company, Worcester, Mass.

Application December 6,

1933, Serial No. 701,172

11 Claims. (Cl. 242-43) This invention relates to improvements in feedmechanism for bobbin or spool winding machines and it is the generalobject of the invention to provide simple and efficient mechanism formoving a bobbin or spool longitudinally with respect to the traverse ofthe thread eye.

Certain bobbins or spools are provided with a flange at one end which isdisposed at an angle of approximately 45 to the barrel or cylindricalpart of the spool, and with such spools it is necessary to effect arelative movement between the traverse stroke of the thread eye and the.tube or spool as yarn accumulates on the barrel of the spool. As setforth herein'we cause the thread eye to have its traverse movement in agiven space for all diameters of the yarn on the spool, and move thelatter longitudinally as the diameter of the wound yarn increases.

It is an important object of our present invention to achieve thisresult by a simple relation .of cams one of which is moved an amountproportional to the increasing diameter of the spool and moves the otherto cause longitudinal shift of the spool.

It is a further object of our invention to provide the winding spindleor shell for the spool with a hollow chamber to receive a spring aroundthe driving shaft effective to hold the cam faces in close contact witheach other so that the feed will be uniform.

It is another object of our invention to derive a force for moving thespool longitudinally from a relatively broad roll which engages thewound yarn over a substantial area to bridge any depressed portions orirregularities in the wound surface, thereby causing the rotary ordriving cam to have a smoothaction on the driven cam.

With these and other objects in view which will appear as thedescription proceeds, our invention resides in the combination andarrangement of parts hereinafter described and set forth in the claims.

In the accompanying drawings, wherein we show two types of control forthe driving or rotary cam,

Fig. 1 is a side elevation of a spool winder having the preferred typeof our invention applied thereto,

Fig. 2 is a vertical section on line 2--2 of Fig. 1 looking in thedirection of the arrows,

Fig. 3 is a horizontal section on an enlarged scale on line 3-3 of Fig.1, showing the empty spool with the driving and driven cam in closedrelation,

Fig. 4 is a view similar to Fig. 3, but with the spool substantiallyfilled a open relation, I

Fig. 5 is a section on line 5-5 of Fig. 3,

Fig. 6 is a diagrammatic view similar to a portion of Fig. 2, butshowing a modified arrangement for actuating the cams, and

Fig. 7 is a detailed section on line 77 of Fi 5.

Referring particularly to Fig. 1, we have shown a fixed frame 10supporting a traverse cam 11 5 with a groove 12 to receive a traversingpin 13. The cam rotates with a shaft 14 and is driven by reductiongearing not specifically shown but contained in the casing 15. A threadeye support 16 has arms 17 and 18 movable about the axis of shaft 14 toswing toward and from the axis of the spool being wound. The lower end19 of arm 18 may be rendered effective to hold the thread eye 20 againstthe spool S for all diameters of yarn on the spool.

A groove 21 in the upper edge of the support 16 receives a rod 22 whichis fast with the traverse pin 13 and the outer or right end of this rod,as viewed in Fig. 1, has upstanding therefrom an eye arm 23 at the upperend of which is located the thread eye 20. A brace 25 secured tothesupport 16 may extend along the arm 23 and pass through an overhangingfinger 26 of arm 23 to brace the thread eye.

The driving mechanism is illustrated at the left of Fig. 1 and includesa belt 30 operatively connected to the reduction gearing 15 and alsodriving the pulley 31 to impart rotation to shaft 32. The latter isjournaled in the upper part of the frame 10 and can be connected to thedriving mechanism by means of a shipper handle 33 connected to a shaft34 rotatable in bearings 35 projecting upwardly from the frame 10. It isnot deemed necessary to illustrate the operation of the shippermechanism,'as the same is well under- 95 stood and it is sufficient tostate that the movement of the handle backwardly or away from theobserver as viewed in Fig. 1 is sufficient to connect the main drivingpulley 36 with the shaft 32 and reduction gearing. 100

The thread eye, may be formed specifically as shown in Fig. 3 with aV-notch 38, and has the left hand edge 39 thereof beveled or inclined atan angle which agrees more or less with the angle of the flange 40 onthe tube or spool S. By this 5 construction it is possible for the notchin the eye to reach the end of the cylindrical part of the spool asindicated in dotted lines in Fig. 3.

The matter thus far described is well understood and-of itself forms nopart of our invention. 11

nd with the cams in I the groove to the spool barrel.

During normal running operations rotation of the cam 11 will cause thethread eye to move back and forth along a horizontal path the range ofwhich along the axis of shaft 32 remains substantially fixed, althoughthe eye will move outwardly away from this axis as winding continues.

In carrying our invention into effect we provide means for moving thespool along the axis of the driving shaft 32 as the thread T increasesin diameter. Accordingly, we secure to the frame 10 a stud 50 having ashoulder 51 and receiving a bearing 52 of a yoke lever 53. The bearingis located between and positioned by the shoulder 51 and a collar 54secured to the stud. The right arm 55 of the lever is bifurcated andreceives a small shaft 56 on which is rotatably mounted a relativelybroad roll 57. The latter is free to rotate between the bifurcations 58which support the shaft 56, and projects sufficiently beyond said armsto have engagement with the thread being wound.

The other arm 60 of the yoke 53 has the upper end thereof connected asat 61 to a chain or other form of flexible connector 62. The latterextends over a reduced hub 63 of a driving or rotary cam 64 which isfree to rotate about the shaft 32. This cam has an involute face 65which engages a similar corresponding face 66 on a second cam 67 alsomounted on the shaft 32. The second or driven cam has threaded thereintoa screw 68 which supports a roll 69 positioned to travel along and beheld in contact with an elongated stop 70 secured to the frame 10. Thisstop 70 restricts angular motion of the cam 67 around shaft 32.

As shown in Fig. 5 the shaft 32 may be somewhat enlarged to receive thebores of the cams 64 and 67, and the shaft may also be provided with aslot '75 to receive a roll 76 turning on a pin 1'7 threaded as at '78into a spool spindle or shell 79. The slot '75 is long enough toaccommodate any longitudinal movement of cam 67 which can be caused bydriving cam 64. I

The outer end of the shell 79 has an enlarged bore 80 defining ashoulder 81 against which presses the inner or left hand end, as viewedin Fig. 5, of a compression spring 82. The outer end of this springbears against a head 83 fastened to or forming a part of the shaft 32.The head fits snugly in and has sliding relation with the bore ,80, andthe spring tends to move the shell and both cams to the left, as seen inFig. 5, fixed stop or hearing 100 limiting action of the spring.

In operation, the cam parts are placed in the position shown in Fig. 3,the spring 82 being effective to hold the parts normally in thisposition by reason of its expansion away from the fixed head 83 and itsconsequent movement of shoulder 81 and therefore the sleeve 79 and cam67'to the left as viewed in Figs. 3 and 5. The parts are so proportionedthat when the spool is located in its inmost position, or to the extremeleft as viewed in Fig. 3, the roller 57 will just bear on thecylindrical part of the spool S. By means of the shipper mechanism thewinder will then be set in operation to rotate the shaft 32 and thelatter by reason of the roll 76 and pin 77 will cause rotary motion ofthe sleeve 79. The sleeve has a frictional fit with the internal bore ofthe spool and the latter is therefore caused to rotate. The thread eyeat the same time traverses along the spool, and the thread T isdelivered through As the latter continues to rotate the depth of thethread will increase and there will result an outward movement of theroll 57 away from the axis of the spool. This will move the arm 60 andtherefore the flexible connector 62 away from shaft 32 and in such adirection as to cause the rotary or driving cam 64 to have a partialrotation. Inasmuch as the stop 70 prevents angular movement of the cam67 the latter will be moved axially along the shaft 32 against theaction of spring 82. The cam 67 abuts the adjacent end of the sleeve,and the latter therefore slides along the shaft 32.

The action just described continues until the required diameter ofthread is wound on the spool. Throughout the winding operation cam 64will be given a. steady uniform rotary motion, thereby effecting asmooth regular motion on the part of cam 67. There results a gradualshift of the spool proportional to the increasing depth of the thread,and the thread guide or eye 20 moves up to the flange 40 regardless ofthe depth of the thead. In this way a tight package of thread can bewound upon the spool.

As shown in Fig. 6 we may operate the cam 64 by a slightly differentconnection. therein the flexible connector 90 is trained around thebottom of the hub 63 in a direction opposite.

As shown to that for the chain 62, and is led directly to traverse ofthe thread guide, this mechanism in-' cluding a driving cam preferablycoaxial with the spool and rotated by an amount proportional to thedepth of thread on the spool to move the spool along its axis. It willfurther be seen that the broad roll 56 is wide enough to engage thehighest parts of the thread without being affected by any lowerareas onthe wound surface, the result of which is to give the cam 64 a smoothangular motion which will insure a uniform wind of thread to produce ahard compact package on the spool. It will further be seen that thespring 82 acts to keep all of the cooperating parts in close operatingrelation with respect to each other so that there is no lost motion, afurther condition assisting in the formation of a correctly wound spool.

The slot '75 is of such length that the roll 76 stops upward movement ofthe sleeve before the cam face 65 reaches the end of the face 66. Thepurpose of this relation is to prevent the rotary driving cam 64 fromever reaching a position where the spring will not act to restore theparts from the position shown in Fig. 4 to that shown in Fig. 3.

Having thus described our invention it will be seen that changes andmodifications may be made therein by those skilled in the art withoutdeparting from the spirit and scope of the invention and we do not wishto be limited to the details herein disclosed, but what we claim is:

1. In a spool winder having a traversing thread eye, a rotatable spindleto hold the spool, a pair of coacting cams coaxial with the spindle andmeans dependent upon the increasing diameter of the thread on the spoolto cause the relative movement of the cams to effect longitudinalmovement of the spindle with respect to the traversing movement of thethread eye.

2. In a spool winder having a traversing thread eye, a rotatable spindleto hold the spool, a cam rotatably mounted to be coaxial with thespindle, means to move the cam by amounts proportional to the increasingdepth of the thread on the spool, and means interposed between the camand the spindle to move the latter as the cam is moved to effect a shiftof the spools relative to the traverse of the eye.

3. In a spool winder having a traversing thread eye, a spindle rotatablymounted to support a spool, a cam coaxial with the spindle and mountedfor rotation, a roll to engage that part of the spool opposite thethread eye, connections between the roll and the cam to give the latterangular movements proportional to the increasing depth of thread on thespool, and means to render the cam effective by rotary movement thereofto shift the spindle and spool relatively to the traversing eye.

4. In a spool winder having a traversing thread eye, a rotatable spoolsupporting spindle, a pair of coacting cams coaxial with the spindle,means to prevent angular motion of one of said cams about the axis ofthe spindle in one direction, the other cam being rotatable in bothdirections of said spindle, means to rotate said other cam by an amountproportional to the depth of the thread wound on the spool, rotation ofsaid other cam effecting longitudinal movement of the first cam and thelatter efiecting an axial shift of the spools relative to the traversingeye.

5. Ina spool winder having atraversing thread eye, a rotatable spoolsupporting spindle, a pair of cams having coacting surfaces said camscoaxial with the spindle, the first of said cams operatively related tothe spindle and movable along the axis of the latter and the other camrotatable about the axis of the spindle, and means dependent upon theamount of thread on the spool to give the second cam angular movementsproportional to the amount of yarn on the spool to effect a longitudinalmovement of the first cam and spindle relatively to the traversing eye.

6. In a spool winder having a traversing thread eye, a rotatable spoolholding spindle shiftable along the axis thereof, a pair of cams coaxialshiftable therealong, a fixed member, a pair of cams coaxial with theshaft andinterposed between the fixed member and the sleeve, said camshaving coacting involute cam faces, and means to cause one of said camsto have a rotary movement relative to the other proportional to theincreasing diameter of the thread on the spool and thereby eflective tomove the sleeve along the shaft,

8. In a spool winding machine having a rotatable shaft, a spoolsupporting sleeve movable longitudinally of the shaft to receive aspool, a part to be moved away from the axis of the spool by amountsproportioned to the amount of yarn wound on the spool, a cam operativelyconnected to said part to be movable by the latter as the spoolincreases in diameter, the cam eflective to move the sleevelongitudinally of the shaft, and a spring acting on the sleeve to holdthe same in operative relation with respect to the cam and tending tomove the latter to cause said part to be held evenly against the yarn onthe spool.

9. In a spool winder having a traversing eye, a rotatable spindle tohold the spool, a pair of coacting cams to move the spindlelongitudinally of the axis thereof to move the spool with respect to thetraversing thread eye and a stop to prevent the cam faces from movingto-relative inoperative position.

10. In a spool winder having a traversing eye,

a rotatable spindle to hold the spool, a pair of coacting cams to movethe spindle longitudinally of the axis thereof to move the spool withrespect to the traversing thread eye and a stop to prevent the cam facesfrom moving to relative inopera=- tive position, and a yielding meanseffective when the spindle is in an extreme position and limited by thestop to tend to move said cam surfac and spool toward the other extremeposition of said spindle.

11. In a spool winding machine having a rotatable shaft, a sleevemounted about the shaft shiftable therealong, a fixed member, a pair ofcams coaxial with the shaft and interposed between the fixed member andthe sleeve, said cams hav-

